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Tri-Roll Comparators

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Medical Gages

Part Masters

Setting Disc's

GSG Zero Spindles

GSG Chamfer Gage's

Snap Gages

Work Holding Fixtures

GSG Plug Gages

Thread Plugs

API Gages

Pipe Threads

True Round Thread Rings

Thread Rings

Custom Gages

ID & OD Segmented Rings

Design & Build Services

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Our story

Glastonbury Southern Gage was formed in 1995 when two of the largest and oldest gage companies, Glastonbury Gage and Southern Gage, were united under one owner. Glastonbury Gage was founded in 1964 in Glastonbury, CT by individuals who had trained at Pratt Whitney Machine. From these beginnings, Glastonbury Gage has continually increased its product offering and services.